الوثيقة الفنية للفرن الدوار Y6287

The rotary kiln is also used to calcine clay, limestone and slag drying, etc., in the production of refractory materials, the use of rotary kiln calcination of raw materials, so that its size stability, strength increases, and then processed into shape. In non-ferrous and ferrous metallurgy, iron, aluminum, copper, zinc, tin, nickel, tungsten, chromium, files and other metals are sintered and roasted in rotary kilns as smelting equipment for ores, concentrates, intermediates, etc. For example, it is used in aluminum production to roast aluminum hydroxide into alumina; it is used in ironmaking to produce pellets for blast furnace ironmaking; it is used in foreign "SL/RN method", "Krupp method" for direct reduction of iron ore; it is used in chlorinated volatile roasting method to extract tin and lead. The ore is magnetized and roasted in a rotary kiln to change the ore's original weak magnetism to strong magnetism to facilitate the magnetic separation. In the chemical industry, rotary kilns are used to produce soda, calcine phosphate fertilizer, barium sulfide, etc. It has the advantages of low energy consumption, low electricity consumption and the utilization of medium and low grade phosphate ore, and has been strongly promoted. In terms of environmental protection, use cement kilns to incinerate hazardous waste and garbage, make waste emissions harmless, use waste as fuel, save coal dust and achieve resource application of waste.